The modulation collimator as an imaging device

Details The modulation collimator as an imaging device The modulation collimator as an imaging device

Jun 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977cosp.meetqq...m&link_type=abstract

COSPAR, Plenary Meeting, 20th, Tel Aviv, Israel, June 7-18, 1977, Paper. 11 p.

Astronomy and Astrophysics

Astronomy

Balloon-Borne Instruments, Collimators, Imaging Techniques, X Ray Sources, Astronomical Maps, Modulation, Radiation Detectors

Scientific paper

Some recent advances in the development of the modulation collimator as an imaging device are discussed. The rotating modulation collimator enables determining the position of a source with only one set of a bigrid modulation collimator. Such a device was flown in a balloon, from where it recorded the image of a small X-ray burst and its negative ghost, from which the source location was determined. By scanning, a two-dimensional map of the source can be obtained. This is done by the multi-pitch-modulation collimator or Fourier transform-telescope. Instead of working with a complete set of a number of Fourier components, an incomplete set can be adopted, which results in a gain in angular resolution but loss of image quality. Means of estimating the missing components instead of equating them to zero will increase the effectiveness of this technique.

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